Definition. A metric space is a set X together with a function d (called a metric or distance function) which assigns a real number d (x, y) to every pair x, y X satisfying the properties (or axioms): 1  d (x, y) 0 and d (x, y) = 0 x = y, 2  d (x, y) = d (y, x),
Here are some facts and guidelines about formaldehyde in plywood and OSB that can help you when building a chicken coop: 1  Formaldehyde is used in the binders and resins of some manufactured wood products. 2  Offgassing can be an issue with products containing urea-formaldehyde (UF) resins.
Top 10 unbelievable historical concurrencies. Oriented strand board (OSB) is an engineered wood panel product made of resin-bonded wood strands or flakes. The wood strands are precisely cut and oriented in order to produce a wood panel with uniform strength and density.SB is manufactured by combining wood and resin coating under high heat and pressure. Whole logs are soaked, stripped of bark, and cut into strands that are typically up to six inches long and one inch wide. The strips are then dried, mixed with resin and a small amount of wax, and formed into layers.